linux-kernel - Re: [lm-sensors] [PATCH] hwmon: Add power meters to Documentation/hwmon/sysfs-interface

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Message-ID: <20070906162917.GA1616@khazad-dum.debian.net>
Date:	Thu, 6 Sep 2007 13:29:17 -0300
From:	Henrique de Moraes Holschuh <hmh@....eng.br>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	"Mark M. Hoffman" <mhoffman@...htlink.com>,
	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org,
	Pavel Machek <pavel@....cz>,
	"Darrick J. Wong" <djwong@...ibm.com>
Subject: Re: [lm-sensors] [PATCH] hwmon: Add power meters to
	Documentation/hwmon/sysfs-interface

On Thu, 06 Sep 2007, Jean Delvare wrote:
> On Mon, 3 Sep 2007 20:22:25 -0300, Henrique de Moraes Holschuh wrote:
> > On Mon, 03 Sep 2007, Jean Delvare wrote:
> > > I see that the power supply class units are 10^-6 A and 10^-6 W, so if
> > > we are supposed to be compatible, I guess we'll have to use this too.
> > 
> > There was a good reason for that, and people who deal with small portables
> > said that they needed 10^-4 A or somesuch, at which point it makes more
> > sense to just go to 10^-6 already.  I don't recall why 10^-6 W, though.
> 
> Well, if we need 10^-4 A, and we use voltages in the 1-2 V range
> (that's what CPU, AGP etc. use these days), then we obviously need
> 10^-4 W as well.

I see, and in that case it is safer to just go to 10^-6 for both.  It is more
future-proof.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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